The traditional method using benzene became uneconomical due to the high and still rising benzene prices and by complying with the regulations of benzene emissions. In addition, US $1,500
50+ Tons
| CAS No.: | 108-31-6 |
|---|---|
| Formula: | C4H2O3 |
| EINECS: | 203-571-6 |
| Type: | Dyestuff Intermediates |
| Appearance: | Powder |
| Quality: | Industrial |
aleic anhydride is an organic compound with the formula C2H2(CO)2O. It is the acid anhydride of maleic acid. It is a colorless or white solid with an acrid odor. It is produced industrially on a large scale for applications in coatings and polymers.
Maleic anhydride is produced by vapor-phase oxidation of n-butane. The overall process converts the methyl groups to carboxylate and dehydrogenates the backbone. The selectivity of the process reflects the robustness of maleic anhydride, with its conjugated double-bond system. Traditionally maleic anhydride was produced by the oxidation of benzene or other aromatic compounds. As of 2006, only a few smaller plants continue to use benzene.
In both cases, benzene and butane are fed into a stream of hot air, and the mixture is passed through a catalyst bed at high temperature. The ratio of air to hydrocarbon is controlled to prevent the mixture from igniting. Vanadium pentoxide and molybdenum trioxide are the catalysts used for the benzene route, whereas vanadium phosphate is used for the butane route:
C4H10 + 3.5 O2 → C4H2O3 + 4 H2O H = −1236 kJ/mol
The main competing process entails full combustion of the butane, a conversion that is twice as exothermic as the partial oxidation.
The traditional method using benzene became uneconomical due to the high and still rising benzene prices and by complying with the regulations of benzene emissions. In addition, in the production of maleic anhydride (4 C-atoms) a third of the original carbon atoms is lost as carbon dioxide when using benzene (6 carbon atoms). The modern catalytic processes start from a 4-carbon molecule and only attaches oxygen and removes water; the 4-C-base body of the molecule remains intact. Overall, the newer method is therefore more material efficient.
| PRODUCT NAME | Maleic anhydride | BATCH NO. | MA170302 |
| Inspection Item | Measurement Unit | Qualified Result | Inspection Result |
| Appearance | White, briquettes | ||
| Purity (%) | ≥ | 99.5 | 99.70 |
| Molten color (APHA) (PT-CO) | ≤ | 20 | 12 |
| Solidification Point (oC) | -- | 52.4 | 52.55 |
| ASH (%) | ≤ | 0.003 | 0.002 |
| IRON (PPM) | ≤ | 5 | 0.30 |
We have various of packages for different products and we are always pleased to satisfy customers' request.
Packaging:
25kg*1000bags/, 25ton/20FCL;
Shipping:
Promote shipping usually 7--14 days after receiving TT deposit or Original LC.
1 Q:Are you manufacturer?
A: As an integrated enterprise, we have our own production lines on Methylene Chloride, Chloroform and Aniline oil, meanwhile we are one of the experienced distributors for other chemicals such as cyclohexanone, Dimethyl Formamide, Propylene Glycol, Ethylene Glycol, Dimethyl Carbonate, Thiourea, Polyol, TDI, IPA, Ethanol etc. We have competitive price benefited by ready stock and good relations with some leading chemical manufacturers.
2 Q: How can you guarantee your quality?
A: Our factory owns mature production line under EPR quality system. We can guarantee the stability and qualification of the raw materials. And we also have SOP loading system to ensure the safety and timely transportation.
3 Q: Can I get some samples?
A: Yes, we welcome sample order for you to test and check our quality. Send me your requirements of the product you need. We can provide sample free of charge, and the express cost is on you.
4 Q: How to confirm the Product Quality before placing orders?
A : You can get free samples from us or taking our previous SGS Reports as reference or arrange SGS before loading.
5 Q: What is your MOQ?
A: Our MOQ is 20'FCL for each product.
6 Q: What kind of package do you have?
A: We have various of packages to meet needs of our customers,like Iron drums,plastic drums, IBC tanks, Flexitank, ISO TANK and bags etc.
7 Q :Which kind of payment terms do you accept?
A: TT, LC, payment terms are acceptable.
8 Q:Can you give me a discount price?
A: Yes. It depends on your order qty.
9 Q: How about your delivery? How long is your delivery time?
A: Prompt and reliable delivery by professional shipping lines.
Generally it takes 14 days after deposit or original LC.
If you are looking for a Fast Delivery Hot Selling 99.5% Maleic Anhydride supplier in China, you are on the right site. Chem9 is located in Dongying, Shandong, China which is a professional company for all kinds of Fast Delivery Hot Selling 99.5% Maleic Anhydride. We can provide you kinds of packaging solutions.
Chem9, the name that you can trust. As a vital professional Chemical Fast Delivery Hot Selling 99.5% Maleic Anhydride manufacturer in China, we warmly welcome your visit to our factory and talk business face to face! We are at your disposal all the time.
